Do you have dried up pens in your class. Be sure to save those pen caps. This is a great, simple, inexpensive way to introduce Cartesian divers.
*1 or 2 liter bottles
*Hex nuts - Have a variety of sizes to see what fits.
That is it. Students will learn about buoyancy, density, and pressure. Give them lots of time to explore and come up with their own ideas. Please take the time to share their ideas in the comment section.
Yours in Science,
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